I want to use gprof to optimize my program. But in its output, time is not counted for any function. All the entries for time are 0.0 . My program runs for 50s. My operating system is Mac OSX. I used
g++ -g -pg -o execname cppfiles.... to compile. How should I solve it? Thanks!
So do you actually run gprof when your program exits? You also need to do this step as well.
Does your program achieve a normal exit, or is it failing in some way?
Do you see a gmon.out file in the current directory (it's where profile data is written to when the program exits).
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
I think so. I didOriginally Posted by Salem
./execname
gprof execname
It achieved a normal exit.
Yes, I saw the gmon.out. I can see other all the information, like how many times a function is called, just the time is always 0.
Thanks!
What do the functions do? Are they using 100% CPU? Or just sleeping?
Found some links, seems like you're not the only one.
gprof bug on Mac OS X?
c++ - gprof reports no time accumulated - Stack Overflow
gprof not working [Archive] - The macosxhints Forums
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
